Machine foe



UNITED sTaTEs PATENT oEEicE.

THOMAS J. MAYALL, OF ROXBURY, MASSICHUSETTS.

MACHINE FOR :MAKING RUBBER BELTING.

Specication of Letters Patent No. 27,730, dated April 3, 21860.

To all whom it may concern:

Be it known that I, THOMAS J. Marani., of Roxbury, m the county of Norfolk and 'State of lviassachusetts, have invented certain new and useful Improvements in the h/Ianufacturing of Machine Belting or Banding, and that the following description, taken in connection with the accompanying drawings hereinafter referred to, forms a full and exact specification of the same, wherein I have set forth the nature and principles of my said improvements by which my invention may be distinguished from all others of a similar class, together with such parts as I claim and desire to have secured to me by Letters Patent.

My invention is more particularly applicable to the formation of a new machine belting or banding for which I have made application for separate Letters Patent, the said belting or banding consisting of a solid woven fabric without seam, coated or covered on one or both sides with india-rubber or gutta-percha.

In theinachine which I have heretofore used and for which I have made separate application for Letters Patent for making this solid belting, the belt or band could be coated only on one side at a time and only one belt or band at a time could be formed, and then only by passing twice through the machine, the inconvenience and great expense of which method are obvious. By my present inode I am enabled to make any number of belts of varying or any desired widths and coat them on both sides, and cover the edges so as to completely cover or incase the inner fabric by once passing through the machine.

The essential features of my new method consist in rolling the rubber or gutta-percha into two wide sheets, which are pressed and fastened upon the woven fabrics that form the inner body of the belts and then nipping the said sheets of rubber or gutta-percha together at proper intervals before they are cut into strips of the required widths of the belts and drawing them completely around the edges of the belts so as to completely incase and @over the inner woven fabrics. rllhe belts thus formed are then cut apart by peculiar cutters the operation of which will be hereinafter explained.

The figures of the accompanying plate of drawings represent my new machine.

Figure l is a plan or top view. Fig. 2

is a central, longitudinal vertical sectionof the sa'me. Figs. and l are detail sections taken respectively in the plane of the lines A B and C D.

a a in the drawings represent the supporting framework of the machine.

b Z) and c 0,-cl (Z andv c c-are largepressure rollers between which, respectively, the india-rubber or gut-ta-percha in a tolera-bly soft and thickmass is fed and rolled into sheets, thence partially around the peripheries of the rollers c c and Z CZ until the sheets come in contact with sheets of duck f or other woven fabrics fed from a supply roll g whereby the upper and lower surfaces of the fabrics, have the india-rubber or gutta-percha ground and driven into them. The belts or bands thus covered then pass to two sets of circular formers z, L of peculiar shape as represented in the drawings, Fig. 3, which, the india-rubber or gutta-percha being in a soft and plastic state, take hold of the upper and under sheets of indiarubber or gutta-percha and crowd and press the same upon the edges of the inner fabrics, or cotton duck, thereby completely uniting the said sheets at proper intervals and covering the said edges with india-rubber or guttapercha. In order to prevent the sheets of rubber from being cut off in passing through the formers, the peripheries of the same are partially cut away or fiattened to allow of the easy passage of the sheets of rubber or gutta-percha between them. The belts or bands then pass to a series of circular cutters z' z' which cut off the superfluous gum from the edges of the belts,-remain ing after their passage through the formers,--and also separating the belts into the required widths. These cutters are formed as shown in the drawings, Fig. et, and revolve one over the other, the upper set revolving at a much faster speed than the lower set thereby producing a cutting motion like that produced by shears, without which peculiar motion the desired effect could not be attained. The edges of the belts or bands are then perfectly formed and smoothed by calender rolls j j, having their peripheries so shaped as to conform with the edges of the belts or bands, after which the belts or bands passing partially around the guide roll 7u are wound upon a suitable mandrel Z.

The formers and cutters z' z' admit of being adjusted laterally by being placed upon a screw-shaft or in any other proper manner so as to be adapted to belts of different Widths.

The calender roll j j should also be so arranged as to be set in any desired positions to correspond to diierent Widths and thicknesses of belts or bands.

Having thus described my improvements I shall state my claims as follows:

What I claim as my invention and desire to have secured to me by Letters Patent is l. The new mode herein described of forming a series of' machine belts or bands at one operation, the same consisting in rolling the india-rubber or gutta-percha into two or more sheets sufficiently Wide to form two or more belts at a time and upon the strips of fabric that compose the inner body of the belts and then nipping the said sheets together and drawing them around the edges of the belts by the mechanical devices herein described, so as to completely incase the inner body of the belts, substantially as set forth.

2. The peculiar shaped formers 72, 71, operating as described to unite the two sheets of india-rubber or gutta-percha and also to form the edges of the belts as described.

3. The cutters a' z' so arranged and operated as to run at different speeds and produce a shear cut upon the rubber or guttapercha, substantially as described.

THOS. J. MAYALL.

Witnesses:

JOSEPH GAVETT, ALBERT W. BROWN. 

